Sleep Lab · Support & sleep position · 4 min read
What pillow height do side sleepers actually need?
Follow shoulder width, not body height. The right loft holds your neck level with your spine; too low lets the head drop toward the mattress, too high pushes it up toward the ceiling.
What do people actually say?
Bought the "high loft" because I am tall. Wrong reason. My shoulders are narrow and my neck has hurt for a month.Reddit r/sleep · 2026-02 · user withheld · source
Which measurement actually matters?
Lie on your side and have someone look at your neck line from the front. It should run roughly parallel to the mattress. That gap between your ear and the mattress is your true loft requirement — for most adults it lands between 90 mm and 130 mm, and it changes with shoulder width far more than with how tall you are.
Body weight and mattress firmness shift it too. A soft mattress lets the shoulder sink in, which means the pillow has less gap to fill; a firm mattress does the opposite. This is why a loft that worked in one bed feels wrong in another.
How do you test it in one night?
- Start at medium. Sleep one night on the middle height. Note whether you wake with neck stiffness (usually too high) or with a shoulder that ached (usually too low).
- Change one thing. Adjust only the loft for the second night — not your position, not the mattress topper. If you change two variables you learn nothing.
- Give it three nights. A new loft feels wrong for roughly two nights while the neck muscles unwind. Judge it on night three.
Where does Curve fit?
AERÉ CurveA butterfly-shaped memory foam pillow with two shoulder notches and two heights in one. $79.00.
Questions people ask next
Not really. Two people of the same height can need different lofts if their shoulders differ. Shoulder width is the better guide.
No. A symmetric shape works either way. Rectangular pillows tempt you to bunch one side up, which is where asymmetry problems start.